Preliminary Data Sheet
Part Number 855745
70 MHz SAW Filter
Subject to change or obsolescence without notice
Rev A
04-18-2002
Page 1 of 5
Features
For broadband applications
Typical 3 dB bandwidth of 5.7 MHz
High attenuation
Single-ended operation
Ceramic Surface Mount Package (SMP)
Small size
Replaces Sawtek P/N 851553 (BW 3dB=5.5 MHz)
Package
Pin Configuration
Surface Mount 19.00 x 6.50 x 1.75 mm
Bottom View
10 9 8
7 6
5
4
3
2
1
Pin No. Description
5
RF
output
10
RF
input
1,6
Ground
2,3,4
Case
ground
7,8,9
Case
ground
R0.51
1.91
2.31
1.02
1.80
0.76
19.0
6.50
1.75 NOM.
1.96 MAX.
Dimensions shown are nominal in millimeters
All tolerances are
0.15mm except overall
length and width +0.15mm/-0.10mm
Body: Al
2
O
3
ceramic
Lid: Kovar, Ni plated
Terminations: Au plating 0.5 - 1.0
m,
over a 2 - 6
m Ni plating
Preliminary Data Sheet
Part Number 855745
70 MHz SAW Filter
Subject to change or obsolescence without notice
Rev A
04-18-2002
Page 2 of 5
Electrical Specifications
(1)
Operating Temperature Range:
(2)
0 to +70
o
C
Parameter
(3)
Minimum
Typical
Maximum
Unit
Center Frequency
- 70 -
MHz
Minimum Insertion Loss
- 22.2
24
dB
Lower 1 dB Bandedge
(4)
Upper 1 dB Bandedge
-
72.35
67.45
72.66
67.65
-
MHz
MHz
Lower 3 dB Bandedge
(4)
Upper 3 dB Bandedge
-
72.73
67.17
72.89
67.27
-
MHz
MHz
Lower 40 dB Bandedge
(4)
Upper 40 dB Bandedge
66.08
-
66.28
73.76
-
73.92
MHz
MHz
Amplitude Variation
67.65
-
72.35
MHz
-
0.61
1.1
dB p-p
Phase Linearity
67.65
-
72.35
MHz
-
2.6
5.0
deg p-p
Group Delay Variation
67.65
-
72.35
MHz
-
55.7
110
nsec
Absolute Delay
- 2.065 -
sec
Relative Attenuation
(4)
10
-
58
MHz
58
-
66
MHz
74
-
82
MHz
82
-
90
MHz
90
-
120
MHz
120
-
145
MHz
145
-
200
MHz
42.0
37.0
41.0
44.5
51.0
47.5
59.0
55
47
47
54
60
54
65
-
-
-
-
-
-
-
dB
dB
dB
dB
dB
dB
dB
Source Impedance:
(5)
- 50 -
Load Impedance:
(5)
- 50 -
Substrate Material
- LiTaO
3
- -
Temperature Coefficient of Frequency
- -23 -
ppm/
o
C
Notes:
1. All specifications are based on the matching schematic shown on page 4
2. In production, devices will be tested at room temperature to a guardbanded specification to ensure electrical compliance over
temperature
3. Electrical margin has been built into the design to account for the variations due to temperature drift and manufacturing tolerances
4. All attenuation measurements are measured relative to minimum insertion loss
5. This is the optimum impedance in order to achieve the performance shown
Preliminary Data Sheet
Part Number 855745
70 MHz SAW Filter
Subject to change or obsolescence without notice
Rev A
04-18-2002
Page 3 of 5
Typical Performance
(at +25
o
C)
Preliminary Data Sheet
Part Number 855745
70 MHz SAW Filter
Subject to change or obsolescence without notice
Rev A
04-18-2002
Page 4 of 5
Matching Schematic
Actual matching values may vary due to PCB layout and parasitics
50
Single-ended
1,2,3,4
6,7,8,9
50
15pF
180nH
10
5
560nH
50
10pF
Marking
PCB Footprint
XXXXXX
855745
SAWTEK
Date Code
ID Dot
2.00
6.70
8.84
.69
1.22
The date code consists of: day of the current year (Julian,
3 digits), last digit of the year (1 digit) and hour (2 digits)
This footprint represents a recommendation only
Dimensions shown are nominal in millimeters
Tape and Reel
1.5
12.0
2.3
4.0
0.3
2.0
0.20
Section A-A
7.1
19.6
R0.75
1.75
1.5
14.2
28.4
32.0
A
A
ID dot
Direction of travel
330
102
2.7
13.0
20.2
2.0
32.8
Dimensions shown are nominal in millimeters
Packaging quantity: 2000 units/reel
Preliminary Data Sheet
Part Number 855745
70 MHz SAW Filter
Subject to change or obsolescence without notice
Rev A
04-18-2002
Page 5 of 5
Maximum Ratings
Parameter
Symbol Minimum
Typical
Maximum
Unit
Operating Temperature Range
T
0
+25
+70
o
C
Storage Temperature Range
T
stg
-40 -
+85
o
C
Warnings
Electrostatic Sensitive Device (ESD)
Avoid ultrasonic exposure
Links to Additional Technical Information
PCB Layout Tips
Qualification Flowchart
Soldering Profile
S-Parameters
Other Technical Information
Sawtek's liability is limited only to the Surface Acoustic Wave (SAW) component(s) described in this data sheet. Sawtek does not accept any liability for
applications, processes, circuits or assemblies which are implemented using any Sawtek component described in this data sheet.
Contact Information
PO Box 609501
Orlando, FL 32860-9501
USA
Phone: +1 (407) 886-8860
Fax: +1 (407) 886-7061
Email:
custservice@sawtek.com
Web:
www.sawtek.com
Or contact one of our worldwide
network of
sales offices,
representatives or distributors
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